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http://dx.doi.org/10.9724/kfcs.2013.29.2.129

Impact of Milling Method on Quality Parameters of Waxy Sorghum Flour  

Ryu, Bog-Mi (Research Institute of Human Ecology, Changwon National University)
Kim, Chang-Soon (Dept. of Food and Nutrition, Changwon National University)
Publication Information
Korean journal of food and cookery science / v.29, no.2, 2013 , pp. 129-135 More about this Journal
Abstract
The objective of this research was to investigate physicochemical properties of waxy sorghum flours by different milling methods (pin mill and ultra fine mill). Four different sorghum flours were used for the experiments ; PWS (pin milled whole sorghum flour), PS (pin milled sorghum flour without bran), UFWS (ultra fine milled whole sorghum flour), UFS (ultra fine milled sorghum flour without bran). The contents of crude ash and total dietary fiber were the highest in PWS. Amylose content of pin milled sorghum flour was higher than that of ultra fine milled flour. The mean particle size of pin milled flours was six times lager than ultra fine milled flours. The L values of UFS and UFWS were higher than those of PS and PWS, whereas a and b values were higher in PWS. The water binding capacity was highest in UFWS, and solubility was higher in PS and UFS. Swelling power of flours was highest in UFS. The damaged starch content was higher in PS and UFS, which means damaged starch of sorghum flours significantly affected by polishing than milling method. The pasting properties were higher in the pin milled flours. Initial pasting temperature of pin milled flour was ranging from 70.5 to $73.1^{\circ}C$, which are higher than ultra fine milled flour ($68.6^{\circ}C$). The contents of total polyphenol were higher in PWS and UFWS than those of PS and UFS, there was no difference between the two milling methods. The results of this study indicate that physicochemical properties of sorghum flour were affected by milling methods as well as bran.
Keywords
sorghum; milling methods; pin mill; ultra fine pulverizer; physicochemical properties;
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Times Cited By KSCI : 7  (Citation Analysis)
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